Minor changes to allow better testing of server push

net/quic/quic_spdy_stream.h

Index: net/quic/quic_spdy_stream.h
diff --git a/net/quic/quic_spdy_stream.h b/net/quic/quic_spdy_stream.h
index 29bab655a1e76dec7301c18699b94a9037e14da6..c07013635ce75b77889ce8a497824bb5e7b63e11 100644
--- a/net/quic/quic_spdy_stream.h
+++ b/net/quic/quic_spdy_stream.h
@@ -52,6 +52,10 @@ class NET_EXPORT_PRIVATE QuicSpdyStream : public ReliableQuicStream {
     // Called when the stream is closed.
     virtual void OnClose(QuicSpdyStream* stream) = 0;
 
+    // Allows subclasses to override and do work.
+    virtual void OnPromiseHeadersComplete(QuicStreamId promised_id,
+                                          size_t frame_len) {}
+
    protected:
     virtual ~Visitor() {}